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Effect of Largest Customer on Sales (Detail)
3 Months Ended 6 Months Ended
Jul. 11, 2020
Jul. 13, 2019
Jul. 11, 2020
Jul. 13, 2019
Total year to date sales | Wal-Mart/Sam's Club | Customer Concentration Risk        
Entity Wide Revenue Major Customer [Line Items]        
Concentration risk percentage 21.60% 22.00% 21.40% 21.10%